1. Solid Residues;ABNT NBR 10004,1987
2. Characterization of coal ashes from Candiota;Andrade,1985
3. Standard Classification of Soils for Engineering Purposes;ASTM D 2487,1993
4. Characterization of residues from coal processing activities in southern Brazil;Binotto,1999
5. A new ring shear apparatus and its application to the measurement of residual strength;Bishop;Géotechnique,1971